Last weekend when I stopped by Taco Bell in Koramangala after grocery shopping, I noticed that aside from the order counter, there was this atm-like machine, a self-order booth, that accepts order and payment. As a techie, I removed myself from the queue and instead tried the machine. At first, it was good and fast, it was able to take my order and very user-friendly, however, when the part that I had to swipe my card to pay came, everything went wrong. I think I spent a good 10 minutes just keep...